1 files changed, 27 insertions, 0 deletions
diff --git a/clang/test/SemaObjC/format-arg-attribute.m b/clang/test/SemaObjC/format-arg-attribute.m
new file mode 100644
index 0000000..6edb8fd
--- /dev/null
+++ b/clang/test/SemaObjC/format-arg-attribute.m
@@ -0,0 +1,27 @@
+// RUN: %clang_cc1 -verify -fsyntax-only %s
+
+@class NSString;
+
+extern NSString *fa2 (const NSString *) __attribute__((format_arg(1)));
+extern NSString *fa3 (NSString *) __attribute__((format_arg(1)));
+
+extern void fc1 (const NSString *) __attribute__((format_arg));  // expected-error {{attribute takes one argument}}
+extern void fc2 (const NSString *) __attribute__((format_arg())); // expected-error {{attribute takes one argument}}
+extern void fc3 (const NSString *) __attribute__((format_arg(1, 2))); // expected-error {{attribute takes one argument}}
+
+struct s1 { int i; } __attribute__((format_arg(1)));  // expected-warning {{'format_arg' attribute only applies to functions}}
+union u1 { int i; } __attribute__((format_arg(1)));  // expected-warning {{'format_arg' attribute only applies to functions}}
+enum e1 { E1V0 } __attribute__((format_arg(1))); // expected-warning {{'format_arg' attribute only applies to functions}}
+
+extern NSString *ff3 (const NSString *) __attribute__((format_arg(3-2)));
+extern NSString *ff4 (const NSString *) __attribute__((format_arg(foo))); // expected-error {{attribute takes one argument}}
+
+/* format_arg formats must take and return a string.  */
+extern NSString *fi0 (int) __attribute__((format_arg(1)));  // expected-error {{format argument not a string type}}
+extern NSString *fi1 (NSString *) __attribute__((format_arg(1))); 
+
+extern NSString *fi2 (NSString *) __attribute__((format_arg(1))); 
+
+extern int fi3 (const NSString *) __attribute__((format_arg(1)));  // expected-error {{function does not return NSString}}
+extern NSString *fi4 (const NSString *) __attribute__((format_arg(1))); 
+extern NSString *fi5 (const NSString *) __attribute__((format_arg(1)));